It is a Tractrix-Horn (Jabo with BMS-Drivers from Hannover. Quite common over here in Hifi circles, by the way.).

The sound is definitely an acquired taste like all horn designs are. But I only heard compliments after my first party. One cannot help but fall in love with my highs after listening to Charlie Mingus 'Solo dancer' or Rej by Hundred Birds.

The infamous Sweet Spot isn't a factor in a small room. I doubt expos are that superior.